Use browserify with legacy libs

The problem:

Browserify makes your frontend javascript more modularized and it helps to organize the frontend codes much better. But only use browserify is not enough if you are using some legacy libs. Which means such libs are not qualified for npm publication. for example some libs just simply use a global variable: window.Module

Introduce to browserify-shim:

For those libs which expose themselves as window.Module, add the following to your package.json:

"browserify": {
  "transform": [
    "browserify-shim"
  ]
},
"browserify-shim": {
  "module": "global:Module",
}

What browserify-shim does here is it replaces:

var module = require('module')

with:

var module = (typeof window !== "undefined" ? window.Module : typeof global !== "undefined" ? global.Module : null)

Why not just use var module = window.module